Till today I have no idea how to take advantage of free promo bets. Thanks for info. Let me check it, looks like it is time to end short term gambling break.
For the risk free bets of 10$, the rules were quite simple. You just needed to make a bet on a selected match with an odd of minimum of 1.5. You could bet on any market you liked and if you lost your bet, you got your 10$ back in your account. Check out the promotion page on Duelbits, they add regurarly some nice new promotions
Stake created 100% and 50% guarantee bet with max refund around 25-50$, 500$ is to high, most people will try to abuse the promotion ~XD. The casino will get targeted by sharp sport betting user.
I don't think is a good advice for over 500$.
It is not going to be a long-term promo, for 2 weeks period it sounds nice and I doubt the promo budget will break its target in terms of financial costs. The affordable marketing budget can be spend on this promo and they can filter accounts with some turnover/deposit limits btw..